I have avast! installed and thought I was using the Call Blocking feature. But have been receiving many calls from car warranty and credit cards, among others. The number does appear on my phone, so once I figure out what it's about I hang up and go into avast! and add the number to the Call Blocker listing from my call log. I was wondering how the callers managed to get so many new numbers (didn't really pay attention to whether or not it was a recognized number), and then checked my Call Blocking history ... only 2 blocked entries. So while I have lots of numbers listed in my Blacklist, the Blocker isn't stopping them from coming through. Am I doing something wrong? Did I miss a setting somewhere?